President George W. Bush shakes hands with Nancy Pelosi during their post-election meeting at the White House in November 2006. Pablo Martinez Monsivais/AP hide caption

itoggle caption Pablo Martinez Monsivais/AP

President Obama casts an early ballot for the midterm elections at the Dr. Martin Luther King Community Service Center in Chicago on Monday. Brendan Smialowski/AFP/Getty Images hide caption

itoggle caption Brendan Smialowski/AFP/Getty Images

Clay Aiken hugs a supporter during an election night watch party May 6 in Holly Springs, N.C. Aiken went on to win the primary by fewer than 400 votes. Gerry Broome/AP hide caption

itoggle caption Gerry Broome/AP